Mutagen vs Carcinogen Mutagen and carcinogen are two terms that have a lot in common. There is a potential that a single substance could be both of them at the same time and be only one of the two, as well.
A curb bit is a type of bit used for riding horses that uses lever action. It includes the pelham bit and the Weymouth curb along with the traditional curb bit used mainly by Western riders. Kimblewicks or Kimberwickes are modified curb bits, and a curb bit is used in a double bridle along with a bradoon.
A snaffle is one type of bit. There are three main types, snaffle, curb and hackamore. A hackamore has no mouthpiece (bitless bridle). A curb has shanks, and a snaffle does not. For a snaffle, the reins are right at the corners of the horse's mouth.